Freely-swinging shaking mechanism



Dc. 2, 19.24n 1,517,587

E. ROTH FREELY SWINGING SHAKING MECHANISM Filed Aug. 20. 1925 alim Uli, A E 5 vse Patented De1.2,.1924.

UNITED STATES PATENT oFFlcE.

ERNST ROTH, 0F NIEDEnUzwIL, syvITzERLalvi).l Assrenom To THE FIRM GEBRDER I BHLER, or UzwIr., SWITZERLAND. v

FREELY-SWINGING SHKING MEcHANISM.

Applica/tion inea August-2o, 1923. seriai No. 658,407.

To all whom may concern.:

Be it known that I, ERivsT ROTH, a citi- Zenof `the Republic of Switzerland, residing at Niederuzwil." Switzerland, have invented l certain new and useful Improvements in Freel\"-S\v1ng1ng\ Shaklng Mechanism74 of which the following 1s a specilicatmn, reference being had therein to the :accompanying drawing. f

Freely swinging shaking mechanisms for oscillating machinery re known which' comprise two gyrating vv? same angular speed and exert the same centrifugal action and are positively driven by meansof a pair of geanwheels.y Inorder to prevent the generation of a prejudicial moment on the bearing Surfaces and thereby large bearing pressures and extensive wear of those surfaces which drawbacks are caused by the centrifugal forces of the gyrating weights it is contemplated to have the.- centrifugal forces of the gyrating weights act within the. bearing surfaces; vwith gyrating weights rotating in planes that are at a comparatively great distance from each other there is no 'difficulty in accomplishing this. The arrangement t the gyrating weightsat a great distano lfrom each other presentshowever several disadvantages. it is therefore the object of the present invention to 'overcome the above mentioned difficulties inherent torconstructions with which the planes of rotation of the gvrating weights yare at least nearf 4to taken up by the bearing surfaces. In a pre-l ferred embodiment two pins serving as journals for thetbeari'ngs of the gyrating,weights are rigidly connected to each other between the weightsby a member formed so .that the two intermeshing gear wheels, which serve to drivethe two gyrating weights, can

eights that rotate in'. opposite directions to each other withthe be inserted froml opposite sides to bring Nthem into mesh.4

Three constructional examples of the sub-f jectmatter ofthe present invention are illustrated on the accompanying drawings, 'ini which: c

Fig. 1 is a vertical section through a lirt constructional example. and

Fig. 2 is a horizontal section of Fig. 1. n Fig. 3 is a detail section, on an enlarged scale;

L.,Fig. 4 is a vertical section through a second constructional example and Y i Fig. 5 is a vertical section through' a third constructional example.

With the embodiment of the invention illustrated in Figs. 1-3, 1 denotes one of the gvrating weights *rotating in the plane a and 2 isl the other gyrating weight rotating in the plane b.- The planes a and are close to each other and thetwo gyrating weights `are shaped to form together a casing like unit. Outside of this unit and of the space `between the planes a and b two bearings 4 and 5 respectively are fixed on the machinery part 3 to which oscillatory motion-has to be imparted by the gyrating weights. In the 'free end of each bearing a pin 6 or 7 respectively is mounted with its outer end, the pins extending through the space con fined bv the planes aand b and their inner ends lying within the other gvratingl weights. The latter are looselv mounted upon the bolts 6 or 7 respectively'. The hubs of thev gyrating weights are built to form bearing surfaces and are so farextended to- ,wards the planes a and b respectively-that 'the centrifugal forces act within the bearing surfaces. The hubs are further shaped to 4form gear wheels 8 and 9 which are in mesh. The gvrating weight -2 acts as a' `belt pullev and is rotated bv means of a belt.A

In order toiX-the positions of the two pins and of-.the spur gear wheelsA relativelv to4 roo ^ theminto mesh. The space between the two planes a; andv 7) may be kept very small. As the centrifugal forces of the gyrating masses act within the bearing surfaces a good distribution of the bearing pressure and a small wear of the bearings is attained. Instead of the spur gear wheels 9 and 8 screw wheels may be used.

In the construe-tional example illustrated in Fig. 4 the gryating'weight v1a forms one integral part with the hub 1b and the spur vgear wheel 9a, likewisethe gyrating mass 2 is integral with the hub 2b and the spur gear wheel 8a. By this means a long bearing surface for the gyrating masses is obtained i and this bearing surface is very considerably lengthened in the direction towards the gyrating masses. The arrangement of the parts is so chosen that the plane of rotation of the gyrating masses coincides to form one plane c. The member 12 provides for the necessary rigidity of the whole system and ensures a proper meshing of the gear wheels. ,The whole shaking mechanism is inclosed in a. 'casing 15 provided with a cover 16, the ncasing may serve as a container for lubricat ing oil. AUpon the pin 7a a gear wheel 17 rigidly connected to the gyrating mass'2L is rotatably mounted; the gear wheel 17 coopcrates with the gear wheel 18 to whlch rotation is imparted by a belt pulley 19 arranged outside the casing 15. The `latter i's xed to the machinery part 3 towhich oscillatory movement has to lbe imparted.

Another solution'ofv designing the shaking -mechanism is illustrated in Fig. 5 in which gear wheels 21 'and thebearings-22 of the 'rotating )shaft 23 areenclosed in a small casing 20, the latter being connected by a narrow pedestal 24 to the oscillating maychinery part. One` ofthe shafts 23 is provided with a driving pulley 25.l The gyrating masses 26 and 27 areJ so eonstructed'that the planes d ande of rotation of the centrifugal forces are close to each other and that the lcentrifugal forces act within the bearing surfaces.

With all the above described cons-truc` tional examples the planes inwhich the centrifugal forces act are close to each other.

I claim:

1. `In a device of the kind described the combination of two gyrating weights adapt.- ed to rotate with equal angular speeds in two directions that are opposite to each other and that exert the same centrifugal actions for imparting oscillatory motion to a machinery part, with a pair of intermeshing gear wheels adapted to positively drive said gyrating weights, bearing means for rotatably` mounting said gyrating weights and gear wheels including pins serving as axles for said gyrating weights and hubs on said gyrating weights provided with bearing surfaces, and a member arranged between said gyrating weights and serving to hold said pins in determined position and to 'ensure a proper meshing of the gear wheels, the member permitting the gear wheels to be inserted into it from opposite sides into their meshing position, the gyrating weights and bearing means being so disposed that the planes of` rotation of the gyrating weights are at least close to each other and that the hubs are so far lengthened towards said planes that the centrifugal forces act within the bearing surfaces.

2. In a device of the kind described,`tlie combination of two gyrating weights adapted to rotate with equal angular speeds in two directions that are opposite to each other and that exert the same centrifugal actions for imparting oscillatory' motion to a machinery part, with a pair of intermeshing gear wheels adapted to positively drive said gyrating weights, bearing means for rotatably lmounting said gyrating weights and gear wheels including pins serving as axles for said gyrating weights, said gear wheels being/integral with the respective hubs of the gyrating weights, and a member arranged between said gyrating weights and serving to hold said pins in determined position and to ensure a proper meshin(T of the gear wheels, the member permitting t 1e gear wheels to be inserted into it from opposite sides into their meshing positions, the gyrat- 111g weights and bearing means being so disposed that `the planes of rotation of the gyrating weights are at least close to each other and that the hubs are so far lengthened towards Vsaid planes that the centrifugal forces act within the bearing surfaces.

In testimony whereof I aiix my signature.

ERNST ROTH. 

